Send 3 part gid (source, layer, id) in GeoJSON responses

helper/geojsonify.js

@@ -177,6 +177,16 @@ function copyProperties( source, props, dst ) {
   });
 }
 
+/**
+ * Create a gid from a document
+ * @TODO modify all importers to create separate source and layer fields to remove mapping
+ *
+ * @param {object} src
+ */
+function makeGid(src) {
+  return lookupSource(src) + ':' + lookupLayer(src) + ':' + src._id;
+}
+
 /**
  * Determine and set place id, type, and source
  *
@@ -185,6 +195,7 @@ function copyProperties( source, props, dst ) {
  */
 function addMetaData(src, dst) {
   dst.id = src._id;
+  dst.gid = makeGid(src);
   dst.layer = lookupLayer(src);
   dst.source = lookupSource(src);
 }

test/unit/helper/geojsonify.js

@@ -141,6 +141,7 @@ module.exports.tests.search = function(test, common) {
         },
         'properties': {
           'id': 'id1',
+          'gid': 'type1:type1:id1',
           'layer': 'type1',
           'source': 'type1',
           'label': '\'Round Midnight Jazz and Blues Bar, test3, Angel',
@@ -169,6 +170,7 @@ module.exports.tests.search = function(test, common) {
         },
         'properties': {
           'id': 'id2',
+          'gid': 'type2:type2:id2',
           'layer': 'type2',
           'source': 'type2',
           'label': 'Blues Cafe, test3, Smithfield',
@@ -194,6 +196,7 @@ module.exports.tests.search = function(test, common) {
         },
         'properties': {
           'id': '34633854',
+          'gid': 'osm:venue:34633854',
           'layer': 'venue',
           'source': 'osm',
           'label': 'Empire State Building, Manhattan, NY',